The origin of Galactic CRs up the knee energy remains unanswered and provides
strong motivation for the study of gamma-ray sources at energies above 10 TeV.
We discuss recent results from ground-based gamma-ray Cherenkov imaging systems
at these energies as well as future observational efforts in this direction.
The exciting results of H.E.S.S. give clues as to the nature of Galactic CR
accelerators, and suggest that there is a population of Galactic gamma-ray
sources with emission extending beyond 10 TeV. A dedicated system of Cherenkov
imaging telescopes optimised for higher energies appears to be a promising way
to study the multi-TeV gamma-ray sky.Comment: Presented at the conference 'Physics At The End Of The Galactic
Cosmic Ray Spectrum' Aspen (April 2005) see
http://www.cosmic-ray.org/conf/index.html (8 pages, 6 figures
